package com.nowcoder.community.controller;

import com.google.code.kaptcha.Producer;
import com.nowcoder.community.entity.User;
import com.nowcoder.community.service.impl.UserServiceImpl;
import com.nowcoder.community.util.CommunityConstant;
import com.nowcoder.community.util.CommunityUtil;
import com.nowcoder.community.util.RedisKeyUtil;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.CookieValue;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import javax.imageio.ImageIO;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletResponse;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.io.OutputStream;
import java.util.Map;
import java.util.concurrent.TimeUnit;

/**
 * @author cjh
 * @date 2023/1/1 - 11:14
 */
@Controller
@Slf4j
public class LoginController implements CommunityConstant {
    @Autowired
    UserServiceImpl userService;
    @Autowired
    Producer producer;
    @Value("${server.servlet.context-path}")
    private String contextPath;

    @Autowired
    private RedisTemplate template;

    @RequestMapping(path = "/register", method = RequestMethod.GET)
    public String getRegisterPage() {
        return "site/register";
    }

    @RequestMapping(path = "/login", method = RequestMethod.GET)
    public String getLoginPage() {
        return "site/login";
    }

    @RequestMapping(path = "register", method = RequestMethod.POST)
    public String register(Model model, User user) {
        Map<String, Object> map = userService.register(user);
        if (map == null || map.isEmpty()) {
            model.addAttribute("msg", "注册成功，已发送激活邮件，请尽快激活");
            model.addAttribute("target", "/index");
            return "/site/operate-result";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            model.addAttribute("emailMsg", map.get("emailMsg"));
            return "/site/register";
        }
    }

    //http://localhost:8080/community/activation/101/code
    @RequestMapping(path = "/activation/{userId}/{code}", method = RequestMethod.GET)
    public String activation(Model model, @PathVariable("userId") int userId, @PathVariable("code") String code) {
        log.info("进入了");
        int result = userService.activation(userId, code);
        if (result == ACTIVATION_SUCCESS) {
            model.addAttribute("msg", "激活成功，账号可以正常使用");
            model.addAttribute("target", "/login");
        } else if (result == ACTIVATION_REPEAT) {
            model.addAttribute("msg", "无效操作 账号已激活");
            model.addAttribute("target", "/index");
        } else {
            model.addAttribute("msg", "激活失败 激活码不正确");
            model.addAttribute("target", "/index");
        }
        return "/site/operate-result";
    }

    @RequestMapping(path = "/kaptcha", method = RequestMethod.GET)
    public void getKaptcha(HttpServletResponse response/*, HttpSession session*/) {
//    生成验证码
        String text = producer.createText();
        BufferedImage image = producer.createImage(text);

//        放入session
//        session.setAttribute("kaptcha", text);

//        验证码的归属
        String kaptchaOwner = CommunityUtil.generateUUID();
        Cookie cookie = new Cookie("kaptchaOwner", kaptchaOwner);
        cookie.setMaxAge(60);
        cookie.setPath(contextPath);
        response.addCookie(cookie);
//      将验证码存入cookie
        String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
        template.opsForValue().set(redisKey, text, 60, TimeUnit.SECONDS);

//        图片输出给浏览器
        response.setContentType("image/png");
        try {
            OutputStream outputStream = response.getOutputStream();
            ImageIO.write(image, "png", outputStream);
        } catch (IOException e) {
            log.error("相应验证码失败" + e.getMessage());
        }
    }

    @RequestMapping(path = "/login", method = RequestMethod.POST)
    public String login(String username, String password, String code,
                        boolean rememberme, Model model/*, HttpSession session*/,
                        HttpServletResponse response, @CookieValue("kaptchaOwner") String kaptchaOwner) {
//        检查验证码
//        String kaptcha = (String) session.getAttribute("kaptcha");

        String kaptcha = null;
        if (StringUtils.isNoneBlank(kaptchaOwner)) {
            String redisKey = RedisKeyUtil.getKaptchaKey(kaptchaOwner);
            kaptcha = (String) template.opsForValue().get(redisKey);
        }


        if (StringUtils.isBlank(kaptcha) || StringUtils.isBlank(code) ||
                !kaptcha.equalsIgnoreCase(code)) {
            model.addAttribute("codeMsg", "验证码不对");
            return "/site/login";
        }
        int expiredSeconds = rememberme ? REMEMBER_EXPIRED_SECONDS : DEFAULT_EXPIRED_SECONDES;
        Map<String, Object> map = userService.login(username, password, expiredSeconds);
        if (map.containsKey("ticket")) {
            Cookie cookie = new Cookie("ticket", map.get("ticket").toString());
            cookie.setPath(contextPath);
            cookie.setMaxAge(expiredSeconds);
            response.addCookie(cookie);
            return "redirect:/index";
        } else {
            model.addAttribute("usernameMsg", map.get("usernameMsg"));
            model.addAttribute("passwordMsg", map.get("passwordMsg"));
            return "/site/login";
        }
    }

    @RequestMapping(path = "/logout", method = RequestMethod.GET)
    public String logout(@CookieValue("ticket") String ticket) {
        userService.logout(ticket);

//        security清理
        SecurityContextHolder.clearContext();

        return "redirect:/login";
    }


}
